JP2005236062A - 不揮発性半導体記憶装置の製造方法 - Google Patents
不揮発性半導体記憶装置の製造方法 Download PDFInfo
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- JP2005236062A JP2005236062A JP2004043804A JP2004043804A JP2005236062A JP 2005236062 A JP2005236062 A JP 2005236062A JP 2004043804 A JP2004043804 A JP 2004043804A JP 2004043804 A JP2004043804 A JP 2004043804A JP 2005236062 A JP2005236062 A JP 2005236062A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 239000000758 substrate Substances 0.000 claims abstract description 52
- 238000001039 wet etching Methods 0.000 claims abstract description 37
- 238000005530 etching Methods 0.000 claims abstract description 27
- 238000001312 dry etching Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims description 71
- 239000011229 interlayer Substances 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 21
- 229910052710 silicon Inorganic materials 0.000 abstract description 21
- 239000010703 silicon Substances 0.000 abstract description 21
- 238000004299 exfoliation Methods 0.000 abstract 1
- 238000007796 conventional method Methods 0.000 description 10
- 238000002955 isolation Methods 0.000 description 9
- 229910052581 Si3N4 Inorganic materials 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 8
- 229910052814 silicon oxide Inorganic materials 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000012535 impurity Substances 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 238000000635 electron micrograph Methods 0.000 description 4
- 238000005468 ion implantation Methods 0.000 description 4
- 238000000059 patterning Methods 0.000 description 4
- 238000001020 plasma etching Methods 0.000 description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 4
- 229920005591 polysilicon Polymers 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000009271 trench method Methods 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 hydroxyl compound Chemical class 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 150000002896 organic halogen compounds Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/788—Field effect transistors with field effect produced by an insulated gate with floating gate
- H01L29/7881—Programmable transistors with only two possible levels of programmation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
- H01L21/0273—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers characterised by the treatment of photoresist layers
- H01L21/0274—Photolithographic processes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31144—Etching the insulating layers by chemical or physical means using masks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/401—Multistep manufacturing processes
- H01L29/4011—Multistep manufacturing processes for data storage electrodes
- H01L29/40114—Multistep manufacturing processes for data storage electrodes the electrodes comprising a conductor-insulator-conductor-insulator-semiconductor structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
- H01L29/42316—Gate electrodes for field effect devices for field-effect transistors
- H01L29/4232—Gate electrodes for field effect devices for field-effect transistors with insulated gate
- H01L29/42324—Gate electrodes for transistors with a floating gate
- H01L29/42336—Gate electrodes for transistors with a floating gate with one gate at least partly formed in a trench
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66825—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a floating gate
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Non-Volatile Memory (AREA)
- Semiconductor Memories (AREA)
- Drying Of Semiconductors (AREA)
Abstract
【解決手段】第1に反射防止膜7を介してKrF線レジスト8を塗布する。これによりレジストの開口寸法自体を小さくすると共に密着性を向上させてウェットエッチング中の剥離を防止する。第2に反射防止膜7のドライエッチングの際に第1の絶縁膜2の途中でエッチングを止める。これにより反射防止膜7を除去すると共に第1の絶縁膜2をドライエッチングにより薄膜化することによってその後のウェットエッチングの時間を短くして基板面方向への広がりを抑制する。第3に第1の絶縁膜2をウェットエッチングにより除去する。これによりシリコン基板1にプラズマダメージが入ることがなくなり、トンネル絶縁膜の信頼性を向上させる。
【選択図】図1
Description
2 第1の絶縁膜(熱酸化膜)
3 第2の絶縁膜(トンネル酸化膜)
4 浮遊ゲート電極
5 層間絶縁膜
6 制御ゲート絶縁膜
7 反射防止膜
8 KrF線レジスト
9 i線レジスト
10 トンネル窓
11 シリコン窒化膜
12 犠牲酸化膜
Claims (3)
- 半導体基板上に第1の絶縁膜を形成する工程と、
前記第1の絶縁膜上に反射防止膜とKrF線に感光するレジストとを順次形成する工程と、
前記レジストに開口部を形成する工程と、
前記レジストをマスクとして、ドライエッチング法を用いて、前記開口部の前記反射防止膜をエッチングすると共に、前記開口部の前記第1の絶縁膜を途中までエッチングする工程と、
前記レジストと前記反射防止膜とをマスクとして、ウェットエッチング法を用いて、前記開口部の残りの前記第1の絶縁膜をエッチングする工程と、
前記レジストと前記反射防止膜とを除去した後、前記半導体基板上に前記第1の絶縁膜よりも薄い第2の絶縁膜を形成する工程と、を含むことを特徴とする半導体装置の製造方法。 - 半導体基板上に第1の絶縁膜を形成する工程と、
前記第1の絶縁膜上に反射防止膜とi線よりも波長の短い光に感光するレジストとを順次形成する工程と、
前記レジストにトンネル窓を形成するための開口部を形成する工程と、
前記レジストをマスクとして、ドライエッチング法を用いて、前記開口部の前記反射防止膜をエッチングすると共に、前記開口部の前記第1の絶縁膜を途中までエッチングする工程と、
前記レジストと前記反射防止膜とをマスクとして、ウェットエッチング法を用いて、前記開口部の残りの前記第1の絶縁膜をエッチングして前記トンネル窓を形成する工程と、
前記レジストと前記反射防止膜とを除去した後、少なくとも前記トンネル窓上に前記第1の絶縁膜よりも薄い第2の絶縁膜を形成する工程と、
前記第2の絶縁膜上に浮遊ゲート電極と層間絶縁膜と制御ゲート電極とを順次形成する工程と、を含むことを特徴とする不揮発性半導体記憶装置の製造方法。 - 前記レジストとしてKrF線に感光するレジストを用い、前記トンネル窓を直径略0.4μm以下で形成することを特徴とする請求項2記載の不揮発性半導体記憶装置の製造方法。
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JP2004043804A JP2005236062A (ja) | 2004-02-20 | 2004-02-20 | 不揮発性半導体記憶装置の製造方法 |
US11/060,319 US20050196905A1 (en) | 2004-02-20 | 2005-02-18 | Semiconductor device featuring fine windows formed in oxide layer of semiconductor substrate thereof, and production method for manufacturing such semiconductor device |
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JP2004043804A JP2005236062A (ja) | 2004-02-20 | 2004-02-20 | 不揮発性半導体記憶装置の製造方法 |
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JP (1) | JP2005236062A (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100859484B1 (ko) * | 2006-09-08 | 2008-09-23 | 동부일렉트로닉스 주식회사 | 플래시 메모리 소자의 제조 방법 |
KR20100095397A (ko) * | 2009-02-20 | 2010-08-30 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 불휘발성 반도체 기억장치 및 그 제작 방법 |
CN102269724A (zh) * | 2011-06-23 | 2011-12-07 | 西安交通大学 | 半导体气敏传感器的定向纳米纤维化三维立体叉指电极的制作方法 |
JP2016048731A (ja) * | 2014-08-27 | 2016-04-07 | ルネサスエレクトロニクス株式会社 | 半導体装置の製造方法 |
WO2016151829A1 (ja) * | 2015-03-26 | 2016-09-29 | 三菱電機株式会社 | 半導体装置の製造方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104617111B (zh) * | 2015-02-03 | 2017-08-25 | 京东方科技集团股份有限公司 | 基板及其制造方法、显示装置 |
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CN102269724A (zh) * | 2011-06-23 | 2011-12-07 | 西安交通大学 | 半导体气敏传感器的定向纳米纤维化三维立体叉指电极的制作方法 |
JP2016048731A (ja) * | 2014-08-27 | 2016-04-07 | ルネサスエレクトロニクス株式会社 | 半導体装置の製造方法 |
WO2016151829A1 (ja) * | 2015-03-26 | 2016-09-29 | 三菱電機株式会社 | 半導体装置の製造方法 |
JPWO2016151829A1 (ja) * | 2015-03-26 | 2017-08-10 | 三菱電機株式会社 | 半導体装置の製造方法 |
US10242876B2 (en) | 2015-03-26 | 2019-03-26 | Mitsubishi Electric Corporation | Method for manufacturing semiconductor device |
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